... .Surface treatment Carburizing, hardening and tempering, nitriding, heavy duty truck gearbox main shaft Detailed Product Description ISO/TS 16949:2009 ZF ... Technology Match type:ZF gearbox 5S-111GP for Howo,North Benz,Steyr,Mercedes Benz,etc ... , QJ805 and all of their spare parts.We supply transmission gearbox parts for Howo, Steyr King, Steyr, Mercedes Benz, North Benz ...